Investigating the Tectonic Function on Alluvial Fans: Emphasizing the Faults Seismic Potential in Construction Units of Kermanshah

The purpose of this study is investigating the influence of tectonic activity and the potential of seismic creation of faults on alluvial fans in different structural zones in Kermanshah as well as zoning fault risk on alluvial fans using spatial analysis of Barbarian. First, by using geomorphic indicators (VF, B, SMF, FCI), the tectonic activity was investigated in the region. Then, the potential of seismic creation of faults was calculated in the surface and adjacent of alluvial fans by means of Zare, Ashjaee, Meloyle and Smith. Finally, using spatial analysis Barbarian, fault risk on alluvial fans and variety of human uses on their surface was checked and the rate of uses density in the fault area was calculated. Findings of the research indicated that the influence of tectonics activity (fault) on the zone of broken Zagros is more than the Sanandaj-Sirjan zone and in the Sanandaj-Sirjan zone is more than folded Zagros. Also the results of investigating the potential seismic of faults indicated that most of the faults have a high seismic potential. The results of fault risk zonation on alluvial fans indicated that 0.54 of residential areas, 0.52 of agricultural land, 0.59 of springs and 0.46 of communication lines located on the studied alluvial fans (West Country) are located in 1000 meters of fault (areas with high risk).